SAMSUNG ML-3471 TONER CARTRIDGE REMANUFACTURING INSTRUCTIONS THE ML-3471 TONER CARTRIDGE DOC# 0438 By Mike Josiah and the technical staff at Summit Technologies a distributor of Summit and Uninet Products.
Remanufacturing the Samsung ML-3471 Toner Cartridge THE ML-3471 TONER CARTRIDGE F irst released in February 2008, the Samsung ML-3471ND printers are based on a 35ppm, 1200dpi engine. This particular model is network ready and has a duplexer built in. The ML-3471 has a first page out in under 9 seconds, uses a 400Mhz Processor and comes standard with 64Mb RAM,(Expandable up to 320Mb). The monthly duty cycle is 50,000 pages. These cartridges do not have a drum cover, and come new with a piece of heavy paper with foam glued to it taped around the cartridge. There are 2 cartridges available for these machines. The LY (ML-D3470A) is rated for 4,000 pages, and the HY (ML-D3470B) is rated for 10,000 pages. At the time of this writing three machines worldwide have been released using this engine. The ML-3471ND, ML-3470D, and the ML-3471DK The cartridges themselves are easy to remanufacture and with list prices (As of 3/1/08) of $199.99 for the HY and 139.99 for the LY, very profitable as well. Required Tools 1) Toner approved vacuum. 2) A small Common screw driver 3) A Phillips head screwdriver 4) Needle nose pliers Required Supplies Samsung ML-3471 Toner 250g for HY ML-D3470B and 125g for LY ML-D3470A cartridges (Preliminary amounts) Replacement Chip HY or LY New replacement Drum New Replacement Wiper Blade New replacement Doctor Blade New Replacement Developer Roller Conductive Grease Drum lubricating powder
1) Place the cartridge with the handle/supply chamber towards you. Remove the 3 screws on the right end cap. See Figure 1 Figure 4 Figure 1 4) On the opposite side of the cartridge, remove the three screws on the left end cap. See Figure 5 2) Gently pry off plastic drum axle bushing. Keep this bushing with the appropriate end cap when removed. Each side is different. See Figure 2 Figure 5 Figure 2 5) Gently pry off plastic drum axle bushing. Keep this bushing with the appropriate end cap when removed. See Figure 6 3) On the top and bottom back edge of the end cap, there are two plastic tabs. Press in on the tab and remove the right end cap. See Figures 3 & 4 Figure 3 Figure 6
6) On the top and bottom back edge of the end cap, there are two plastic tabs. Press in on the tab and remove the left end cap. See Figures 7 & 8. 8) Carefully pry up the side plastic pieces on both sides to release the waste chamber. See Figures 10 & 11 Figure 7 Figure 10 Figure 11 Figure 8 9) Remove the waste chamber. See Figure 12 7) Lift off the roller assembly. See Figure 9 Figure 9 Figure 12
10) On the supply hopper, remove the fill plug and dump out any remaining toner. See Figure 13 Figure 16 Figure 13 11) Remove the developer roller drive gear; put a strip of tape across the remaining gears. They do not need to be removed the tape will help keep them in place See Figures 14 & 15 Figure 14 Figure 17 13) Remove the developer roller. See Figure 18 Figure 15 12) On the fill plug side, press in on the plastic tab and remove the spring/plastic bushing assembly. Be careful not to lose the spring! See Figure 16 & 17 Figure 18
14) Remove the two screws on the doctor blade. See Figure 19 19) Replace the doctor blade and 2 screws. See Fig. 22 Figure 22 Figure 19 16) Carefully pry up the doctor blade. See Figure 20 20) Clean and install the developer roller, long shaft side to gear side first. See Figure 23 Figure 20 17) Clean out any remaining toner from the hopper. Figure 23 21) Snap the spring/plastic bushing assembly in place. Make sure the tail of the spring is set properly. See Figures 24 & 25 18) Clean the doctor blade and foam seals. See Fig. 21 Figure 21 Figure 24
Figure 25 Place the supply hopper aside 25) On the waste hopper, remove the E-ring from the drum axle. See Figure 28 23) Install the drive gear on the developer roller. See Figure 26 Figure 28 26) Slide the drum axle out from the side opposite the E- ring. See Figures 29 Figure 26 24) Fill the hopper with 250g of ML-3471 toner for the HY (10K cartridge and 125g for the LY 4K cartridge).replace the fill plug and check for leaks. See Figure 27 Figure 29 27) Remove the OPC drum. See Figure 30 Figure 27 Figure 30
28) Slide the PCR to the non contact side. Remove the PCR. See Figures 31 & 32 Figure 31 32) Clean the PCR with your preferred PCR cleaner. WARNING: Do not clean the OEM PCR with alcohol, as this will remove the conductive coating from the roller. If the PCR is an aftermarket, follow the cleaning methods recommended by the manufacturer. If the PCR is an OEM, we recommend it be cleaned with your standard PCR cleaner. 33) Clean the old conductive grease off the PCR shaft and contact. Replace with new. See Figure 35 Figure 32 29) Remove the two screws and the wiper blade. See Figure 33 Figure 35 34) Install the PCR by sliding the long shaft side through the non-contact side. Bring it back to fit into the contact side. See Figure 36 30) Clean out all the toner from the hopper. Figure 33 31) Coat the new wiper blade with your preferred lubricant. Install the new wiper blade and two screws. The tail of the wiper blade should face up. See Fig. 34 Figure 36 35) Coat the OPC drum with your preferred lubricant and install the drum. See Figure 37 Figure 34 Figure 37
36) Install the drum axle small drum gear side first. Make sure that the E-ring groove ends up on the small drum gear side. See Figures 38 & 39 Figure 38 Figure 41 Figure 39 37) Install the E-ring. See Figure 40 Figure 42 Figure 40 38) Install the waste hopper on to the supply chamber. Make sure that the tabs on both sides lock into place on the side wall. See Figures 41 & 42 39) Clean the foam rollers in the roller assembly with clean compressed air. 40) Install the roller assembly. See Figure 43 Figure 43
41) Install the right side end cap and three screws. Make sure the top rear tabs lock in place. Figs. 44 & 45 43) Remove the tape from the gears, and install the left side end cap and three screws. Make sure the top rear tab locks in place. See Figures 47 & 48 Figure 44 Figure 47 Figure 45 42) Press the drum axle bushing in place. Set it so the small tab is at the end of the groove; make sure it is fully seated. The two small bushings are different. Make sure you have the correct bushing for this side. See Fig. 46 Figure 48 42) Press the drum axle bushing in place. Set it so the small tab is at the end of the groove; make sure it is fully seated. The two small bushings are different. Make sure you have the correct bushing for this side. See Fig. 49 Figure 49 Figure 46
43) The chip is held in place by plastic rivets. To replace the chip, drill out the plastic rivets and install 2 small self tapping screws. Install the two screws before you remove the cover so that the alignment does not change. You can now remove the screws and cover to replace the chip. See Figures 50 & 51 Configuration page Press the MENU button until Information appears on the display. Press Scroll Button until CONFIGURATION appears on the display Press the OK button. A configuration page will print out Repetitive Defect Chart Upper Fuser roller OPC Drum Lower Pressure roller Transfer Roller Supply roller PCR Developer Roller 77.8mm 75.5mm 62.8mm (Back of page) 47.1mm (Back of page) 44.9mm 37.7mm 35.2mm Machine Error Codes: Figure 50 The error codes put out by these machines are all in plain English and there is no need to go into them here. Expected printer part life: Transfer roller Fuser unit Pickup roller 70,000 pages 80,000 pages 150,000 pages Figure 51 Printing Test Pages: Demo Page Press the MENU button until Information appears on the display. Press Scroll Button until DEMO PAGE appears on the display Press the OK button. A demo page will print out